gradle-build-and-test.yml

name: Gradle build and test

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master
      
jobs:
  buildAndTest:
    runs-on: ubuntu-latest
    steps:
      # print all github info (e.g. branch name, commit id, etc)
      # - name: Github info
      #   run: |
      #     echo "${{ toJSON(github) }}"
      # print all runner (host pc) info (e.g. os, etc)
      # - name: Runner info
      #   run: |
      #     echo "${{ toJSON(runner) }}"

      # set up github actions
      - uses: actions/checkout@v2

      # set up the jdk
      - name: Set up JDK
        uses: actions/setup-java@v2
        with:
          java-version: '8'
          # there's various versions (oracle / openjdk, etc). due to licensing, we'll use the AdoptOpenJDK version
          # because it's free
          distribution: 'adopt'

      # add a cache to avoid having to redownload gradle pkgs for every build
      - name: Cache Gradle packages
        uses: actions/cache@v2
        with:
          path: |
            ~/.gradle/caches
            ~/.gradle/wrapper
          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
          restore-keys: |
            ${{ runner.os }}-gradle-

      - name: Build with Gradle
        run: ./gradlew build
      - name: Cleanup Gradle Cache
        # Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
        # Restoring these files from a GitHub Actions cache might cause problems for future builds.
        run: |
          rm -f ~/.gradle/caches/modules-2/modules-2.lock
          rm -f ~/.gradle/caches/modules-2/gc.properties

      # what's the outcome?
      - run: |
          echo "job completed: ${{ job.status }}."